Express is a massive topic, and we have covered a lot of ground. It's easy to get lost in the details, so here's a list of what you absolutely must be able to do:

• create a new express app?
• listen for GET requests?
• make some text show up in the browser?
• render a static template?
• render a template with data?
• make your route paths dynamic? (e.g. /albums/:albumId)
• show a form?
• listen for POST requests?
• read the data entered into the form?

In case you want to solidify your knowledge with some exercise, here is an example small express apps you can build:

A contacts app with the following routes:

• GET /contacts shows the names of all contacts
• GET /contacts/:id shows the info for a single contact
• GET /contacts/create shows a form for adding a contact
• POST /contacts/create saves the data from the form

Some starter data is included in this repo as data.json

To get more familiar with building backends, create some sample data and build apps for:

• pets
• movies
• cars
• video games
• tv shows

Try implementing the four kinds of routes listed above for each of these apps.# backend-checkpoint